Electronic flash unit



FIG. 1 is a perspective front view of an electronic flash unit, showingour new design,

FIG. 2 is a front plan view thereof,

FIG. 3 is a rear plan view thereof,

FIG. 4 is a right-side plan view thereof,

FIG. 5 is a left-side plan view thereof,

FIG. 6 is a top plan view thereof,

FIG. 7 is a bottom plan view thereof.

The ornamental design for an electronic flash unit, substantially asshown and described.